By definition, the CPOY Award is given to a player who "shows perseverance in overcoming adversity, in the form of not being in the NFL the previous year, a severe injury, or simply poor performance."
https://www.nfl.com/news/breaking-down-nfl-comeback-player-of-the-year-race-0ap2000000050179
I'm not being sarcastic but sincere here: is Damar's return to the game a demonstration of his perseverance? Or is it simply a medical science miracle? How much of him being here and where he is performing at (backup player) a sign of his perseverance rather than great science?
I personally don't know. He's alive, and on a pro team but he has no performance to show for, at least at the game level. Is that enough? I don't know but I can see why people think it should be given to a player who is not only back but who has performed at an unexpectedly high level this year.
Is making the roster as a backup a sign of amazing personal perseverance when that player almost died?
Me, personally, it's a wonderful story, but I might be inclined to give it to a player who has performed at a great level in games. I know people will disagree.